Introducing New Design Technology

Recommended cables applicable to increasing the conductor size
ECSO design is recommended to be applied to Low-voltage Cross-linked
Polyethylene Insulated Cables (CVT) and Low-voltage eco-cables (EM-CET) usedin factories and buildings which are operated with high loading or medium loading
within the operating categorization.
If applied to transmission and distribution cables with high loading, there is a big advantage,
but it is necessary to pay attention because size up (optimization) may affect the strength of
the steel tower and the utility pole, the diameter of the duct, etc. Low-voltage cables used infactories, buildings, etc. are laid in racks (shelves) and pits (grooves) and are recommended
because they are relatively unlikely to have problems in application.

Considering the environmental
and economical aspects

ECSO

Selection Table – ECSO (Environmental Current Rating) TableThe following is the environmental current rating calculated as JCS 4521：2014

Introduction
ain The Interi lsoo
Wiring Cod re(ECSO：Environmental and Economical Conductor Size Optimization)

Table2. Environmental Current RatingConductor Size

CVT Environmental Current Rating（A）
High Loading Operation Mid. Loading Operation Low Loading Operation

8 mm8214 mm21322 mm

20238 mm23260 mm255100 mm

822150 mm2107200 mm

1512250 mm2

182

325 mm

285

2200 mm2 dual

302

250 mm dual

364

2325 mm2 dual

570

91223311520374964

85

Conductor Size
8 mm

14 mm222 mm

238 mm260 mm2127100 mm

174

232

200 mm

165

210

280

329

439

348

464

420

560

658

878

High Loading Operation Mid. Loading Operation Low Loading Operation

295124EM-CET Environmental Current Rating（A）

2150 mm22250 mm2325 mm

2200 mm2 dual
250 mm dual
2325 mm2 dual

89122433

13153439215968215291

88102137

164

189

252

116
196
306
328392612

134226353
378
452
706

179
302
471
504604942

・High loading: 100% in the daytime, 60% to 80% in the night ・Medium loading: 100% in the daytime, 50% in thenight ・Low loading: 100% only in the daytime

Standards to be referred(1) Japanese Standard: JCS 4521:2020 "Optimal current calculation considering theenvironment and economy of electric cables"(2) JEAC 8001-2016 "The Interior Wiring Code"(3) International Standard: IEC 62125 ED.1.0 :2019 "Environmental considerations specificto insulated electrical power and control cables"

We at JCMA are making every possible effort to ensure all the data and information provided on this brochure are accurate. However,
we make no guarantee or warranty regarding the accuracy of them. We do not intend to state that the data and information are correct,
without any errors, reliable, or most updated. We may change or update the information on this brochure without any notice. Any inquiries
and comments are to be made to JCMA.

The Japanese Electric Wire & Cable Makers' Association

Konwa Bldg., 2nd Floor, 1-12-22, Tsukiji, Chuo-ku, Tokyo, JAPAN 104-0045
TEL 03-3542-6035 FAX 03-3542-6037

ECSO
DesignConventional
DesignCost reduction by increasing
the conductor size
The Japanese Electric Wire & Cable Makers' Association
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https://www.jcma2.jp/index.html

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Ecolog y with Economy!
3 Advantages

By increasing the conductor size of the power
cable , you can reduce the transmission /distribution losses, which leads to reduction of CO2emissions and energy saving.

1Power Plant

We at JCMA have established the design"JEAC 8001-2016 The Interior Wiring Code ". Since

Power Generation

Each Loading
Terminal

Demand Terminal

the environmental issues need to be addressed in a
global base, we are making the term, ECSO as an
Internationally Common Key Word, to ensure theintelligence to be shared globally, and to have it asa global standard.
※1 Environmental and Economical Conductor Size
Optimization

Design Technology for Optimum Conductor Size (ECSO)

From‘Minimum Initial Cost’to‘Minimum Life Cycle Cost’*2
Preference has always been given to the lowest
long as safety measures (current rating and❶ CO 2 Emission reduction

These 3 advantages can bring in/direct financial

Conductor
size twiceas large

advantages to us. Table. 1 shows one example offinancial advantages calculated, together with theConventional
Design Distribution
loss 4%
Conductor
size twiceas large

2 Cut peak demand
lower by 2%

Each Loading
TerminalECSO DesignDistribution
loss 2%

3 Energy Saving – reducethe distribution loss by 2%
The cables selected by ECSO
design can transmit the powerwith a leeway, so the loss (orheat generation) can be less.

During the peak demand time zone, theload at the plants can be lowered – thiscan be used favorably on negotiation of
the power tariff for the following year.

preventing the voltage drop) are secured. Design
to define the most appropriate size to make the life
cycle cost lowest, which means the larger cables.

ECSO Design: Select the size
to make the LCC minimum

Large

technology for optimum conductor size (ECSO) isLife Cycle CostThis technology considers both economical anddesign the optimum conductor size.

Initial Cost
Cost

environmental aspects, to make it possible to※2 Life Cycle Cost = Initial Cost + Running (operational) Cost

Small

Running Cost
Conventional Design : Select the size to make the initialcost minimum, which leads to the higher life cycle cost.
Small

JCMA proprietary

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3-4Conductor Size❷ Peak-demand

control ❸Energy Saving

Large

years needed to be break-even for the investment.
Eco-friendly conductor size selection (effecttrial calculation) software which can be easily
calculated by anyone is released below.
https://www.jcma2.jp/gijyutu/ecso/index.html
Before increasing
the conductor size
After increasing
the conductor size

❷ Reduce by 2%❶＆❸Reduce by 2%

06121824Fig. 1 - Power Consumption - Transition by Hour

Table 1 - Calculation results of Economic Advantages - High Loading Condition
Max. Load〔Ａ〕
Current

initial cost, i.e., the smallest possible conductor, as

Advantages as follows (Fig.1).

By reducing the wasted
distribution loss, we can help
reduce CO 2 emission.

to publish "JCS 4521: Calculation of thetogether. This standard is also introduced in theused size to ECSO designed size, we can get thereduction by 2%

technologies of optimum conductor size (ECSO* )Cables", which put the ECSO design methods

By switching the cable from the conventionally

CO２ Emission

1

Environmental Current Rating for the Electric

Economic Advantages – 3 Advantages

Power Consumption

Outline3 Advantages
ROI
Increasing
vsPeakCO２
the Conductor Size Energy
Demand Invst.※4SavingReduction
Existing → ECSO
Control （year）※3（kWh／year) （CO２-t／year）（kW）

308 mm → 38 mm

224,200

10.95.03.040

14 mm2 → 60 mm2

23,70010.7

4.94.350

14 mm2 → 60 mm2

37,00016.77.72.875

38 mm2 → 100 mm2

24,60011.15.15.6

100

38 mm2 → 150 mm2

52,60023.7

11.04.5125

60 mm2 → 200 mm2

48,60021.9

10.15.7

150 100 mm2 → 200 mm2

29,80013.4

6.26.22※3 Calculated amount per 1,000m length of cable※4 T hree ef fects are proportional to the leng th of the cable, but
the number of years to recover the increased investment isdetermined regardless of leng th.

JCMA proprietary

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